While I personally don't care about post counts*, there are many others who do & who have posted in this thread & previous ones re: the topic. It is important to some/them, just like having elite status at hotels, airlines, & car rentals, is important to them.
For those who don't care, good on ya. For those who do care, good on ya.
* As cholula & kokonutz have said, after a certain threshold it really doesn't matter if it's a few thousand or a hundred thousand, or a few hundred or a lot of hundreds. I fall into that mindset.
Cheers.